Editing Calcium oxalate (section)

===Morphology and diagnosis===
The monohydrate and dihydrate can be distinguished by the shape of the respective crystals. 
* Calcium oxalate ''dihydrate'' crystals are [[Octahedral molecular geometry|octahedral]]. A large portion of the crystals in a urine sediment will have this type of morphology, as they can grow at any pH and naturally occur in normal urine.
* Calcium oxalate ''monohydrate'' crystals vary in shape, and can be shaped like dumbbells, spindles, ovals, or picket fences, the last of which is most commonly seen due to [[ethylene glycol poisoning]].<ref>{{cite web|title=Urine Crystals|url=https://ahdc.vet.cornell.edu/clinpath/modules/UA-ROUT/crystsed.htm|website=ahdc.vet.cornell.edu/|publisher=Cornell University|access-date=12 July 2014}}</ref>
<gallery>
File:Calcium oxalate crystals in urine.jpg|Urine microscopy showing calcium oxalate crystals in the urine. The [[Octahedron|octahedral]] crystal morphology is clearly visible.
File:Calcium oxalate crystals (urine) - kalsiyum oksalat kristalleri (idrar) - 01.png|Urine microscopy showing a ''calcium oxalate monohydrate'' crystal (dumbbell shaped) and a ''calcium oxalate dihydrate'' crystal (envelope shaped) along with several erythrocytes.
File:Calcium oxalate crystals (urine) - kalsiyum oksalat kristalleri (idrar) - 02.png|Urine microscopy showing several ''calcium oxalate monohydrate'' crystals (dumbbell shaped, some of them clumped) and a ''calcium oxalate dihydrate'' crystal (envelope shaped) along with several erythrocytes.
File:Calcium Oxalate Detail.png|Urinary sediment showing several calcium oxalate crystals. 40X
File:Urine crystals comparison.png|Comparison of different types of urinary stones.
File:Histopathology of a breast cyst with calcium oxalate crystals, annotated.jpg|Histopathology of calcium oxalate crystals in a benign breast cyst, H&E stain. In the breast, they can be seen on [[mammography]] and are usually benign, but can be associated with [[lobular carcinoma in situ]].<ref>Image by Mikael Häggström, MD.<br>- Reference for benign/LCIS association: {{cite web|url=https://www.pathologyoutlines.com/topic/breastcalcification.html|title=Microcalcifications|author=Hind Warzecha, M.D.|website=Pathology Outlines}} Last author update: 1 June 2010</ref>
</gallery>